①(-12.5)x(-6/7)x(-4) ②(-24/13)x(-16/7)x0x4/3 =0
=﹣12.5×6/7×4
=﹣300/7
③ (-1/2)x(-2/3)x(-1.25)x(-1又1/3)x(-1.8) ④【-7/12+3/4-5/6-(-5/18)】x(-36)
=﹣1 =21-27+30-10
=-14
⑤(-5)x3又1/3+2x3又1/3+(-6)x3又1/3 ⑥-55x(-1/5)-11x1/5+4x(-1/5)
=(-50/3)+19/3- 20 =11-11/5-4/5
=-30又1/3 =8
(7)(-105又5/6)x(+12)
=-1270
不知有没有错